When bob A of a pendulum, released from 30 degrees to the vertical, hits another bob B of the same mass at rest on a table in an elastic collision, how high does bob A rise after the collision?

Options

1. ABob A rises to the same height as its initial release point.
2. BBob A does not rise; it remains at the same level.
3. CBob A rises to a height less than its initial release point.
4. DBob A rises to a height greater than its initial release point.